I've been trying to get a 32 bit Fedora/armv7hl guest to boot on a 64 bit Fedora/aarch64 host.
Host: Fedora Rawhide, aarch64 on Mustang
Guest: Fedora 22 disk image from:
$ virt-builder --arch armv7l fedora-22
I should say that:
(1) I can boot this guest using an external <kernel> and <initrd> and some hand written libvirt XML. However external kernel is not very flexible, since it means you have to do a dance on the host each time you update the guest.
(2) I can boot this guest on x86-64 host using external kernel.
(3) It doesn't boot with UEFI in the guest, but that is expected since the guest doesn't contain a UEFI bootloader, and I'm not even sure if there is such a thing as UEFI for 32 bit ARM.
Anyway, I attempted to boot this disk image without the external kernel hack using:
$ virt-install --arch armv7l --import --name test3 --ram 2048 --disk path=/var/tmp/test3.qcow2,format=qcow2 --os-variant fedora22
but it just hangs with a blank console, and with qemu-system-aarch64 [sic] using 100% CPU. I poked around inside the disk image, and there seems to be no evidence that it booted, eg. no logs, no updated timestamps.
Should I try a newer guest? I am going to try updating to Fedora 23.
Is it even possible to boot a 32 bit disk image without external kernel?
Rich.
On Sat, Feb 27, 2016 at 01:33:26PM +0000, Richard W.M. Jones wrote:
Should I try a newer guest? I am going to try updating to Fedora 23.
Same thing.
Attached is the qemu command line. In this run I'm using some hand-constructed XML, not 'virt-install --import' as before, but AFAIK all important options are the same.
Rich.
On Saturday, February 27, 2016 03:44:04 PM Richard W.M. Jones wrote:
On Sat, Feb 27, 2016 at 01:33:26PM +0000, Richard W.M. Jones wrote:
Should I try a newer guest? I am going to try updating to Fedora 23.
Same thing.
Attached is the qemu command line. In this run I'm using some hand-constructed XML, not 'virt-install --import' as before, but AFAIK all important options are the same.
Rich.
It is currently not possible to boot a 32 bit arm vm without an external kernel and initrd. I have played with having a u-boot that will work. But right now you would need to construct the guest to match the specs hardcoded into u-boot. It is a problem that needs to be solved
Dennis
On Sat, Feb 27, 2016 at 10:45:55AM -0600, Dennis Gilmore wrote:
On Saturday, February 27, 2016 03:44:04 PM Richard W.M. Jones wrote:
On Sat, Feb 27, 2016 at 01:33:26PM +0000, Richard W.M. Jones wrote:
Should I try a newer guest? I am going to try updating to Fedora 23.
Same thing.
Attached is the qemu command line. In this run I'm using some hand-constructed XML, not 'virt-install --import' as before, but AFAIK all important options are the same.
Rich.
It is currently not possible to boot a 32 bit arm vm without an external kernel and initrd. I have played with having a u-boot that will work. But right now you would need to construct the guest to match the specs hardcoded into u-boot. It is a problem that needs to be solved
Thanks Dennis. When you say you've played with u-boot, does that mean booting with an external u-boot binary? That would be a considerable improvement over external kernel.
Rich.
On 2016-02-27 11:59, Richard W.M. Jones wrote:
On Sat, Feb 27, 2016 at 10:45:55AM -0600, Dennis Gilmore wrote:
On Saturday, February 27, 2016 03:44:04 PM Richard W.M. Jones wrote:
On Sat, Feb 27, 2016 at 01:33:26PM +0000, Richard W.M. Jones wrote:
Should I try a newer guest? I am going to try updating to Fedora 23.
Same thing.
Attached is the qemu command line. In this run I'm using some hand-constructed XML, not 'virt-install --import' as before, but AFAIK all important options are the same.
Rich.
It is currently not possible to boot a 32 bit arm vm without an external kernel and initrd. I have played with having a u-boot that will work. But right now you would need to construct the guest to match the specs hardcoded into u-boot. It is a problem that needs to be solved
Thanks Dennis. When you say you've played with u-boot, does that mean booting with an external u-boot binary? That would be a considerable improvement over external kernel.
Rich.
Yes I have used u-boot as a kernel. its very rough and not really a good experience, at least in that you have to configure the vm the same as u-boot was built.
On 02/28/2016 11:38 PM, Dennis Gilmore wrote:
On 2016-02-27 11:59, Richard W.M. Jones wrote:
On Sat, Feb 27, 2016 at 10:45:55AM -0600, Dennis Gilmore wrote:
On Saturday, February 27, 2016 03:44:04 PM Richard W.M. Jones wrote:
On Sat, Feb 27, 2016 at 01:33:26PM +0000, Richard W.M. Jones wrote:
Should I try a newer guest? I am going to try updating to Fedora 23.
Same thing.
Attached is the qemu command line. In this run I'm using some hand-constructed XML, not 'virt-install --import' as before, but AFAIK all important options are the same.
Rich.
It is currently not possible to boot a 32 bit arm vm without an external kernel and initrd. I have played with having a u-boot that will work. But right now you would need to construct the guest to match the specs hardcoded into u-boot. It is a problem that needs to be solved
Thanks Dennis. When you say you've played with u-boot, does that mean booting with an external u-boot binary? That would be a considerable improvement over external kernel.
Rich.
Yes I have used u-boot as a kernel. its very rough and not really a good experience, at least in that you have to configure the vm the same as u-boot was built.
There's uboot builds that work with qemu + arm vexpress, courtesy of Gerd:
http://blog.wikichoon.com/2014/11/booting-fedora-21-arm-with-qemu-and-u.html
But uboot isn't going to work with qemu-system-arm -M virt because uboot doesn't have any virtio support
- Cole
W dniu 27.02.2016 o 14:33, Richard W.M. Jones pisze:
I've been trying to get a 32 bit Fedora/armv7hl guest to boot on a 64 bit Fedora/aarch64 host.
Host: Fedora Rawhide, aarch64 on Mustang
Guest: Fedora 22 disk image from:
$ virt-builder --arch armv7l fedora-22
I used virt-manager for it:
https://marcin.juszkiewicz.com.pl/2016/01/17/running-32-bit-arm-virtual-mach...
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Cole Robinson -
Dennis Gilmore -
Marcin Juszkiewicz -
Richard W.M. Jones